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/****************************************************************************** |
* |
* Module Name: utalloc - local memory allocation routines |
* |
*****************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, Intel Corp. |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* 1. Redistributions of source code must retain the above copyright |
* notice, this list of conditions, and the following disclaimer, |
* without modification. |
* 2. Redistributions in binary form must reproduce at minimum a disclaimer |
* substantially similar to the "NO WARRANTY" disclaimer below |
* ("Disclaimer") and any redistribution must be conditioned upon |
* including a substantially similar Disclaimer requirement for further |
* binary redistribution. |
* 3. Neither the names of the above-listed copyright holders nor the names |
* of any contributors may be used to endorse or promote products derived |
* from this software without specific prior written permission. |
* |
* Alternatively, this software may be distributed under the terms of the |
* GNU General Public License ("GPL") version 2 as published by the Free |
* Software Foundation. |
* |
* NO WARRANTY |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
* POSSIBILITY OF SUCH DAMAGES. |
*/ |
|
#include <acpi/acpi.h> |
#include "accommon.h" |
#include "acdebug.h" |
|
#define _COMPONENT ACPI_UTILITIES |
ACPI_MODULE_NAME("utalloc") |
|
#if !defined (USE_NATIVE_ALLOCATE_ZEROED) |
/******************************************************************************* |
* |
* FUNCTION: acpi_os_allocate_zeroed |
* |
* PARAMETERS: size - Size of the allocation |
* |
* RETURN: Address of the allocated memory on success, NULL on failure. |
* |
* DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory. |
* This is the default implementation. Can be overridden via the |
* USE_NATIVE_ALLOCATE_ZEROED flag. |
* |
******************************************************************************/ |
void *acpi_os_allocate_zeroed(acpi_size size) |
{ |
void *allocation; |
|
ACPI_FUNCTION_ENTRY(); |
|
allocation = acpi_os_allocate(size); |
if (allocation) { |
|
/* Clear the memory block */ |
|
memset(allocation, 0, size); |
} |
|
return (allocation); |
} |
|
#endif /* !USE_NATIVE_ALLOCATE_ZEROED */ |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ut_create_caches |
* |
* PARAMETERS: None |
* |
* RETURN: Status |
* |
* DESCRIPTION: Create all local caches |
* |
******************************************************************************/ |
|
acpi_status acpi_ut_create_caches(void) |
{ |
acpi_status status; |
|
/* Object Caches, for frequently used objects */ |
|
status = |
acpi_os_create_cache("Acpi-Namespace", |
sizeof(struct acpi_namespace_node), |
ACPI_MAX_NAMESPACE_CACHE_DEPTH, |
&acpi_gbl_namespace_cache); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
|
status = |
acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state), |
ACPI_MAX_STATE_CACHE_DEPTH, |
&acpi_gbl_state_cache); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
|
status = |
acpi_os_create_cache("Acpi-Parse", |
sizeof(struct acpi_parse_obj_common), |
ACPI_MAX_PARSE_CACHE_DEPTH, |
&acpi_gbl_ps_node_cache); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
|
status = |
acpi_os_create_cache("Acpi-ParseExt", |
sizeof(struct acpi_parse_obj_named), |
ACPI_MAX_EXTPARSE_CACHE_DEPTH, |
&acpi_gbl_ps_node_ext_cache); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
|
status = |
acpi_os_create_cache("Acpi-Operand", |
sizeof(union acpi_operand_object), |
ACPI_MAX_OBJECT_CACHE_DEPTH, |
&acpi_gbl_operand_cache); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
#ifdef ACPI_DBG_TRACK_ALLOCATIONS |
|
/* Memory allocation lists */ |
|
status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
|
status = |
acpi_ut_create_list("Acpi-Namespace", |
sizeof(struct acpi_namespace_node), |
&acpi_gbl_ns_node_list); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
#endif |
|
return (AE_OK); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ut_delete_caches |
* |
* PARAMETERS: None |
* |
* RETURN: Status |
* |
* DESCRIPTION: Purge and delete all local caches |
* |
******************************************************************************/ |
|
acpi_status acpi_ut_delete_caches(void) |
{ |
#ifdef ACPI_DBG_TRACK_ALLOCATIONS |
char buffer[7]; |
|
if (acpi_gbl_display_final_mem_stats) { |
strcpy(buffer, "MEMORY"); |
(void)acpi_db_display_statistics(buffer); |
} |
#endif |
|
(void)acpi_os_delete_cache(acpi_gbl_namespace_cache); |
acpi_gbl_namespace_cache = NULL; |
|
(void)acpi_os_delete_cache(acpi_gbl_state_cache); |
acpi_gbl_state_cache = NULL; |
|
(void)acpi_os_delete_cache(acpi_gbl_operand_cache); |
acpi_gbl_operand_cache = NULL; |
|
(void)acpi_os_delete_cache(acpi_gbl_ps_node_cache); |
acpi_gbl_ps_node_cache = NULL; |
|
(void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache); |
acpi_gbl_ps_node_ext_cache = NULL; |
|
#ifdef ACPI_DBG_TRACK_ALLOCATIONS |
|
/* Debug only - display leftover memory allocation, if any */ |
|
acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL); |
|
/* Free memory lists */ |
|
acpi_os_free(acpi_gbl_global_list); |
acpi_gbl_global_list = NULL; |
|
acpi_os_free(acpi_gbl_ns_node_list); |
acpi_gbl_ns_node_list = NULL; |
#endif |
|
return (AE_OK); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ut_validate_buffer |
* |
* PARAMETERS: buffer - Buffer descriptor to be validated |
* |
* RETURN: Status |
* |
* DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer |
* |
******************************************************************************/ |
|
acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer) |
{ |
|
/* Obviously, the structure pointer must be valid */ |
|
if (!buffer) { |
return (AE_BAD_PARAMETER); |
} |
|
/* Special semantics for the length */ |
|
if ((buffer->length == ACPI_NO_BUFFER) || |
(buffer->length == ACPI_ALLOCATE_BUFFER) || |
(buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) { |
return (AE_OK); |
} |
|
/* Length is valid, the buffer pointer must be also */ |
|
if (!buffer->pointer) { |
return (AE_BAD_PARAMETER); |
} |
|
return (AE_OK); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ut_initialize_buffer |
* |
* PARAMETERS: buffer - Buffer to be validated |
* required_length - Length needed |
* |
* RETURN: Status |
* |
* DESCRIPTION: Validate that the buffer is of the required length or |
* allocate a new buffer. Returned buffer is always zeroed. |
* |
******************************************************************************/ |
|
acpi_status |
acpi_ut_initialize_buffer(struct acpi_buffer * buffer, |
acpi_size required_length) |
{ |
acpi_size input_buffer_length; |
|
/* Parameter validation */ |
|
if (!buffer || !required_length) { |
return (AE_BAD_PARAMETER); |
} |
|
/* |
* Buffer->Length is used as both an input and output parameter. Get the |
* input actual length and set the output required buffer length. |
*/ |
input_buffer_length = buffer->length; |
buffer->length = required_length; |
|
/* |
* The input buffer length contains the actual buffer length, or the type |
* of buffer to be allocated by this routine. |
*/ |
switch (input_buffer_length) { |
case ACPI_NO_BUFFER: |
|
/* Return the exception (and the required buffer length) */ |
|
return (AE_BUFFER_OVERFLOW); |
|
case ACPI_ALLOCATE_BUFFER: |
/* |
* Allocate a new buffer. We directectly call acpi_os_allocate here to |
* purposefully bypass the (optionally enabled) internal allocation |
* tracking mechanism since we only want to track internal |
* allocations. Note: The caller should use acpi_os_free to free this |
* buffer created via ACPI_ALLOCATE_BUFFER. |
*/ |
buffer->pointer = acpi_os_allocate(required_length); |
break; |
|
case ACPI_ALLOCATE_LOCAL_BUFFER: |
|
/* Allocate a new buffer with local interface to allow tracking */ |
|
buffer->pointer = ACPI_ALLOCATE(required_length); |
break; |
|
default: |
|
/* Existing buffer: Validate the size of the buffer */ |
|
if (input_buffer_length < required_length) { |
return (AE_BUFFER_OVERFLOW); |
} |
break; |
} |
|
/* Validate allocation from above or input buffer pointer */ |
|
if (!buffer->pointer) { |
return (AE_NO_MEMORY); |
} |
|
/* Have a valid buffer, clear it */ |
|
memset(buffer->pointer, 0, required_length); |
return (AE_OK); |
} |